Content of macroelements in the blood serum of polbar chicken depending on sex and age

Summary.

The study was carried out on chickens protected genetic resources polbar breed. In each case from 100 birds (50 hen and 50 cockerels) being in 8-, 12-, and 18-weeks of age blood was collected to determine the content of minerals (Ca, Na, K and Mg) in the blood plasma. The aim of this study was to assess the impact of gender and age of polbar breed on the level of calcium, sodium, potassium and magnesium in the blood serum. The concentration of each macronutrient was varied in different age groups. Higher average concentration of calcium, magnesium and sodium in three test periods were obtained for the cocks, while for hens higher concentrations of potassium were recorded. For each of the elements studied, there was no statistically significant difference between hens and cocks. The results of the mineral content in the plasma of consolidated genetically breed can be used for comparison to other poultry breeds.